galfert’s gists

javan / screenshot.js

Created June 19, 2012 21:40

Create a screenshot of any URL using phantomjs (headless webkit)

	//
	// Example usage: phantomjs screenshot.js http://yahoo.com /tmp/yahoo.png
	//

	var system = require('system');
	var url = system.args[1];
	var filename = system.args[2];
	var page = new WebPage();

	page.open(url, function (status) {

jboner / latency.txt

Last active June 5, 2025 16:44

Latency Numbers Every Programmer Should Know

	Latency Comparison Numbers (~2012)
	----------------------------------
	L1 cache reference 0.5 ns
	Branch mispredict 5 ns
	L2 cache reference 7 ns 14x L1 cache
	Mutex lock/unlock 25 ns
	Main memory reference 100 ns 20x L2 cache, 200x L1 cache
	Compress 1K bytes with Zippy 3,000 ns 3 us
	Send 1K bytes over 1 Gbps network 10,000 ns 10 us
	Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD

norman / character_reference.rb

Last active September 9, 2021 20:48

HTML entities? We don't need no stinkin' HTML entities.

	# coding: utf-8
	#
	# Encode any codepoint outside the ASCII printable range to an HTML character
	# reference (https://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references#Character_reference_overview).
	def encode(string)
	string.each_codepoint.inject("") do \|buffer, cp\|
	cp = "&#x#{cp.to_s(16)};" unless cp >= 0x20 && cp <= 0x7E
	buffer << cp
	end
	end

gasman / pnginator.rb

Created April 30, 2012 18:08

pnginator: pack Javascript into a self-extracting PNG

	#!/usr/bin/env ruby -w

	# pnginator.rb: pack a .js file into a PNG image with an HTML payload;
	# when saved with an .html extension and opened in a browser, the HTML extracts and executes
	# the javascript.

	# Usage: ruby pnginator.rb input.js output.png.html

	# By Gasman <http://matt.west.co.tt/>
	# from an original idea by Daeken: http://daeken.com/superpacking-js-demos

coderoshi / cors.coffee

Created April 25, 2012 17:18

CORS NodeJS Middleware

	exports.cors = (req, res)->
	origin = (req.headers.origin \|\| "*")
	if req.method.toUpperCase() == 'OPTIONS'
	res.writeHead 200,
	'Access-Control-Allow-Origin': origin
	'Access-Control-Allow-Credentials': true
	'Access-Control-Allow-Methods': '*'
	'Access-Control-Allow-Headers': 'Accept, Authorization, Cache-Control, Content-Type, Origin, Referer, User-Agent, X-CSRF-Token'
	'Content-Type': 'text/plain'
	'Server': 'jsonapi'

jlong / uri.js

Created April 20, 2012 13:29

URI Parsing with Javascript

	var parser = document.createElement('a');
	parser.href = "http://example.com:3000/pathname/?search=test#hash";

	parser.protocol; // => "http:"
	parser.hostname; // => "example.com"
	parser.port; // => "3000"
	parser.pathname; // => "/pathname/"
	parser.search; // => "?search=test"
	parser.hash; // => "#hash"
	parser.host; // => "example.com:3000"

erikh / hack.sh

Created March 31, 2012 07:02 — forked from DAddYE/hack.sh

OSX For Hackers

	#!/usr/bin/env sh

	##
	# This is script with usefull tips taken from:
	# https://github.com/mathiasbynens/dotfiles/blob/master/.osx
	#
	# install it:
	# curl -sL https://raw.github.com/gist/2108403/hack.sh \| sh
	#

roidrage / tmux.md

Created March 16, 2012 16:22

benedikt / active_model_serializers.rb

Created March 2, 2012 17:40

Makes mongoid and active_model_serializers play nicely together

	# config/initializers/active_model_serializers.rb
	Mongoid::Document.send(:include, ActiveModel::SerializerSupport)
	Mongoid::Criteria.delegate(:active_model_serializer, :to => :to_a)

doctyper / gist:1411283

Created November 30, 2011 22:11

Add latency to localhost

	# enable
	sudo ipfw pipe 1 config bw 50KBytes/s delay 100ms
	sudo ipfw add 1 pipe 1 src-port 80
	sudo ipfw add 2 pipe 1 dst-port 80

	# disable
	sudo ipfw delete 1
	sudo ipfw delete 2

Garret Alfert galfert